# -*- coding: utf-8 -*-

import numpy as np


# =======================

def sta001(k, nyear, xd):
    d2 = np.fv(k, nyear, -xd, -xd);
    d2 = round(d2)
    return d2


# =======================

d40 = 1.4 * 40
print("d40,40 x 1.4=", d40)
d = sta001(0.05, 40 - 1, 1.4);
print("01保守投资模式，", d, round(d / d40))

d2 = sta001(0.20, 40 - 1, 1.4);
print("02激进投资模式，", d2, round(d2 / d40))

dk = round(d2 / d)
print("dk,两者差别（xx倍）：", dk)
